<h1><code ng:non-bindable="">ngChange</code>
<span class="hint">(directive in module <code ng:non-bindable="">ng</code>
)</span>
</h1>
<div><a href="http://github.com/angular/angular.js/edit/master/src/ng/directive/input.js"
        class="improve-docs btn btn-primary">Improve this doc</a>

    <h2 id="Description">Description</h2>

    <div class="description">
        <div class="ng-directive-page ng-directive-ngchange-page"><p>Evaluate given expression when user changes the
            input.
            The expression is not evaluated when the value change is coming from the model.</p>

            <p>Note, this directive requires <code>ngModel</code> to be present.</p></div>
    </div>
    <h2 id="Usage">Usage</h2>

    <div class="usage">This directive can be used as custom element, but be aware of <a href="guide/ie">IE
        restrictions</a>.as element:<pre class="prettyprint linenums">&lt;ng-change&gt;
&lt;/ng-change&gt;</pre>
    </div>
    <h2 id="Example">Example</h2>

    <div class="example">
        <div class="ng-directive-page ng-directive-ngchange-page"><h4>Source</h4>

            <div source-edit="" source-edit-deps="angular.js script.js" source-edit-html="index.html-135"
                 source-edit-css="" source-edit-js="script.js-134" source-edit-unit=""
                 source-edit-scenario="scenario.js-136"></div>
            <div class="tabbable">
                <div class="tab-pane" title="index.html">
                    <pre class="prettyprint linenums" ng-set-text="index.html-135"
                         ng-html-wrap=" angular.js script.js"></pre>
                    <script type="text/ng-template" id="index.html-135">

                        <div ng-controller="Controller">
                            <input type="checkbox" ng-model="confirmed" ng-change="change()" id="ng-change-example1"/>
                            <input type="checkbox" ng-model="confirmed" id="ng-change-example2"/>
                            <label for="ng-change-example2">Confirmed</label><br/>
                            debug = {{confirmed}}<br/>
                            counter = {{counter}}
                        </div>
                    </script>
                </div>
                <div class="tab-pane" title="script.js">
                    <pre class="prettyprint linenums" ng-set-text="script.js-134"></pre>
                    <script type="text/ng-template" id="script.js-134">
                        function Controller($scope) {
                        $scope.counter = 0;
                        $scope.change = function() {
                        $scope.counter++;
                        };
                        }
                    </script>
                </div>
                <div class="tab-pane" title="End to end test">
                    <pre class="prettyprint linenums" ng-set-text="scenario.js-136"></pre>
                    <script type="text/ng-template" id="scenario.js-136">
                        it('should evaluate the expression if changing from view', function() {
                        expect(binding('counter')).toEqual('0');
                        element('#ng-change-example1').click();
                        expect(binding('counter')).toEqual('1');
                        expect(binding('confirmed')).toEqual('true');
                        });

                        it('should not evaluate the expression if changing from model', function() {
                        element('#ng-change-example2').click();
                        expect(binding('counter')).toEqual('0');
                        expect(binding('confirmed')).toEqual('true');
                        });
                    </script>
                </div>
            </div>
            <h4>Demo</h4>

            <div class="well doc-example-live" ng-embed-app="" ng-set-html="index.html-135"
                 ng-eval-javascript="script.js-134"></div>
        </div>
    </div>
</div>
